In the majority of incorrect proofs, the respondent will cite PEMDAS or BODMAS, however these solvers incorrectly resolve the [P]arentheses or [B]rackets of PEMDAS - BODMAS, ignoring the Distributive Law. For some reason, they believe that they can solve within the parentheses, but ignore the adjacent and dependent coefficient.
''Wolfram Mathworld'' confirms that this is the way we handle on parenthetical expressions:
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:: 1. ''Parentheses are used in mathematical expressions to denote modifications to normal order of operations (precedence rules)...''